Automatic typewriter



July 1, 1930. K. D. EVANS AUTOMATIC TYPEWRITER Filed June 29, 1928 5 Sheets-Sheet mw-zmon ATTORNEYJ vM|7 v i: R I

K. 1:). EVANS 1,769,626

AUTOMATIC: TYPEWRITER July 1, 1930.

Filed June 29, 1928 5 Sheets-Sheet 2 INVENTOR 13 4 ATTORNEYS July 1, 1930. K. D. EVANS I AUTOMATIC TYPEWRITER Filed June 29, 1928 5 Sheets-Shee 3 M WWM ATTORNEYQ July 1, 1930. KDEVANS 1,769,626

AUTOMATIC TYPEWRITER Filed June 29, 1928 5 Shets-Sheet 4 IIIIIIIIII INVENTOR 9 ym M WWW/Z2? ATTORNEYS July 1, 1930.

K. D. EVANS 4 1,769,626

AUTOMATiC TYPEWRITER Filed June 29, 1928 I 5 Sheets-Sheet 5 J I ATTORNEY Patented July 1, 9

"UNITED STATES PATENT- oFFlcE KELLEY n. EVANS, on HAMILTON, OHIO, ASSIGNOR or" ONE-HALF To 0. n. noovn'n,

. r 1 or HAMILTON, onro AUTOMATIC TYPEWRITER Application filed June 29,

This invention relates to an automatic typewriter and particularly to a mechanism for positively moving the carriage in both directions for letterand word spacing, for indenting and tabulating purposes, and for the carriage return. That is to say, the invention relates to mechanism for moving the carriage in either direction for all the different pure poses stated above by power derived from suitable motive means, such as anelectric motor, as distinguished from carriage movement bya spring or by hand, as in ordinary typewriters. This application is a continuation in part of my prior application Serial No.

189,754, filed May 9, 1927, as a division of an earlier. application Serial No. 115,659 filed June. 12, 1926. p

In my prior application, Serial No. 115,659,

I have disclosed an automatic typewriter.

' wherein the type bars are operated automatically or by a motor operated device, the selection occurring either through a perforated record sheet or manually by the depression of the keys of the keyboard. The key levers havenodirect or positive connection with the ,type bars and as the latter are actuated or swung to printing position by the motor driven actuator, whether the selection occurs through the perforated record sheet or manuaoally, so in both instances, i. e., with either mode of selection, the printed impressions will be exactly the same in appearance, thus making it possible for-the operator to stop the feed ofthe record sheet at an'y point and to insert in the communication being written matter not covered by the record sheet withp out changing in the slightest degree, the appearance of the typewriting.

The object of this invention is to provide an eflicient, durable and otherwise satisfactory positive carriage actuating mechanism for moving the carriage in both directions for the purposes previously enumerated, the movement of the carriage being controlled either through the record sheet or manually by the depression of suitable keys, but in either event being moved by motor operated means preferably suitably connectedto the same motor which is utilized in feeding the record sheet and in'actuating the type bars.

1928. Serial No. 289,131.

The invention may be briefly summarized as consistlng in certain novel details of con struction and combinations and arrangements of parts which will be described in the specifi cation and set forth inth'e appended clalms.

In the accompanying sheets of drawings wherein I have shown an embodiment which operates very effectively, Fig. 1 is a rear view of my improved automatic typewriter, this view and at least part of the views to be referred to either omitting or showing conventionally certain parts unessential to the un-- derstanding of the invention and which are commonly employed on typewriters; Fig. 2 is an end view of the machine looking toward the right-hand end of Fig. 1, parts being shown in section Fig. 3 is a vertical transverse sectional view; Fig. 4 is a similar view but looking in the opposite direction; Fig.

5 is a rear view omitting some of the parts and some being in section and broken-away to illustrate the structure at the top of the machine omitted from Fig, 1; Figs. 6"and 7 are, respectively, a horizontal sectional View and a vertical sectional view showing certain details for the actuation of the pawl employed in spacing the carriage; and Fig. 8 is a fragmentary rear view, with parts insection, showing a 'slight modification. Referring now to the drawings, I will briefly describe the general construction of the machine including the type bar actuating mechanism claimed and more fully described in myprior application Serial No. 115,659. The machine includes a frame 10 at the front levers being illustrated at 11, these key levers being pivoted on a cross-shaft 12 and being adapted to swing in the slots of a comb 13,

and each key lever'having a downward extension 14 terminating in a rearwardly projecting part 15 and being adapted to be returned to normal position bya spring 16.

" The automatic typewriter has the usual type bars 18, only oneof which is shown,

pivoted ona fulcrum wire mounted in the v customary slotted segment 20, and when the type bar is swung to printingv position, it

enters the usual guideindicated at 21. The

85 of which is a keyboard corresponding to the r keyboard'of an ordinary typewriter, the. key

platen is indicated conventionally at 22 but 1 I have not illustrated the carriage which supports the platen as this may be of any suitable construction but the carriage frame which is illustrated at 22 will be referred to presently.

There is no direct connectionbetween the key levers and type bars but each type'bar is connected to a sub-link 23 fulcrumed on a wire 24 in a slot of a forwardly facing comb 25. Each sub-link has a slotted portion 26 engaged by a pin 27 of an actuating member 28 hereinafter termed the actuating lever, one

' of which is provided for each of the different key levers of the keyboard. The different actuating levers are arranged side by side and are spaced apart by the teeth of' the front and rear combs 29 and 30 and all of these actuating levers are independently capable of a slight sliding movement to bring them into the path. of a motor driven actu ator to be referred .to and also being capable of rocking movement about a stationary fulcrum shaft -or bar 31. These actuating levers are supported by the fulcrum shaftand by a stationary support 33 forming a part of the comb 30 and they are normally held in the position stated and illustrated in Fig. 3

there being between the pieces forming by springs 34. Each actuating lever has at 1ts rear end' a spring actuated pin 37 normally held in upper, or retracted position b the unperforated part of the record sheet but adapted to be lowered when a perforation of the sheet comes under the pin. The front portion of the actuating lever has a similar spring actuated pin 39 which is normally held retracted by the forward extension 15 of the corresponding key lever 11 but this pin is adapted to be moved upwardly under the action of the spring'associated with it when the key lever is depressed manually so I as to bring a slot 41 opposite the pin.

shield a slot which extends the full length of the shield and is directly beneath the rear pins 37 of the actuating levers 28.

' Supported within the shield is a bar 45 which has its outer portion curved to conform to the cylindrical curvature of the upper part of the shield and is adapted to move back and forth in the slot of the shield so that when the rear pin 37 of any actuating lever the 28 is lowered into the path of this oscillating carrying at its ends sprocket wheels 47 which feed the perforated record sheet 42, one of the sprocket Wheels being provided with a ratchet wheel 48 adapted to be operated by a pawl 49, so that the record sheet will be given a step by step movement. The rear oscillatingbar 45 which, as above stated, is adapted to engage therear spring pins 37, is one of two simultaneously moving oscillating bars, the other being illustrated at 50, this last mentioned bar beingadapted to engage the front spring. pins 39 of the actuating levers 28 when said pins are moved upwardly through the slots of the key lever extensions 15 when the key levers are depressed so that this front oscillating bar may move the actuating levers forwardly in the same manner that they are moved forwardly by the rear oscillating bar bv en aging the rear spring pins 37. The bar 50 is supported by arms 51 secured to a rock shaft 52.

When an actuating lever 28 is moved forwardly either by the oscillating bar 45 or the bar 50, an upward extension at the front of The machine has amain drive shaft 56- which is driven by a motor 57 which may be located at any suitable point and is'connected to the drive shaft by any suitable gearing such as by spiral gears. This shaft 56, which rotates continuously as long as the machine is in operation, is provided at one end with two eccentrics 60 and 61' which are secured to the shaft in fixed relation to the other, one bein practically in advance of the other. ates the two oscillating bars 45 and 50 as well as the sprockets which feed the record sheet, and to this end, it is engaged by an eccentric sleeve having a rearwardly projecting arm 62 which carries the pawl 49 and is connected to an arm 63 fixed with reference to feed shaft 46. It also has a relatively short forwardly projecting arm 64 connected to a link 65 pivoted to an arm 66 secured to the front rock shaft 52 for actuating the front oscillating bar 50.

When the typewriting is to be done through the actuation of the key levers, it is desirable that the record sheet be stationary and, accordingly, provision is made for ren- ?)ne of these eccentrics actu-' involved inthe present invention.

dering inoperative the pawl and ratchet mechanism which feeds the record sheet, this being accomplished by a device 67 which can be operated manually by a key or other means to disengage the pawl from the ratchet.

' The other eccentric 61 on the main drive I shaft is engaged by an eccentric sleeve provided with an upwardly extending arm 69 connected to one of the arms 54 supporting the actuator 53..

From the above description, it will be understood that the actuating levers corre-- sponding to the different type bars are first moved forwardly either through selection by the record sheet, in which event they are moved forwardly by the bar 45 or by manual selection, in which event theyare moved forwardly by the oscillating bar 50and are then engaged by the actuator and rocked so as to swing the type bars to printing position. Immediately after an actuating lever and type bar are rocked in this manner, the actuating lever is restored toits former position and the type bar swings back to its normal position.

I will now describe the parts more directly The carriage frame 22*,portions of which only are shown, (the carriage itself being omitted as it forms no part of the present invention) is slidably mountedontwo way-rods 70 and 71. Though the particular gear members herein illustrated for imparting the back and forth movements to the carriage frame are not essential to my invention, in this instance the carriage frame is provided on its lower rear side with a fixed shaft 73 having a spiral thread or groove extending substantially throughout its length. This spirally grooved shaft is engaged by the equivalent of a nut designated as a whole in Fig. 1 by the reference character 74, this nut being a rotatable member held from endwise movement and provided with a pin which extends inwardly which, as previously explained, is rocked back and forth with the oscillations imparted to the motor driven actuator 53. The pawlis pressed upward by a spring 76 shown in Fig. 4. The manner in which this pawl is controlled so that it causes theqcarriage to feed one step immediately after a printing impression is made will be explained hereinafter. v

The gear 75 is engaged by a gear 78 carried by a sleeve 79 pinned or otherwise secured to a shaft which is motor driven in-a manner to be explained presently. The sleeve is preferably provided with a fairly deep of and to guide the .pawl 76*. This shaft .80 has its outer end mounted in a suitable bearing in one side of frame 10and itsinner end is j ournalled in a frame 82, the base of which extends down to and is suitably secured to the cross-bar forming apart of comb 25. At its upper end this frame 82 has a pair of spaced arms82 located on opposite sides of the nut 74 and of the gear 78 with its sleeve 79 and forming the inner bearings for shaft 80 and also serving to hold the nut 74 against endwise movement on the spirally grooved shaft 7 3 of the carriage. It will be observed from Figs. 1 and 3 that the lower portion of the frame 82 is curved over rock shaft 55 and that the arm. 77 which actuates the pawl 7 driving shaft 56 and through the medium of which shafts 84 and 80 may be rotated in either direction so as to'rotate the nut 74 in either direction and move the carriage frame 70 either to the right orleft'.

Suitably connected to a bracket'88 on the base of the machine (Fig. 5) are two gear shifters 89 and 90 which are adapted to move the gears 86 and 87 into. and out of engagement with the bevel gear 85. These gear shifters are adapted to be actuated by two actuating levers 28 and 28" which are similar to the actuating levers 28 associated with the printing key levers,and are mounted and have movements or are actuated in precisely the same way as the actuating levers associated with the printing keylevers, being selectively controlled either 'by the perforated record sheet or by the depressing oftwo shift keys carried by the key levers forming a part of the regular key board equip-v ment. These two actuating levers 28 and 28 differ from the main actuating levers 28 in the respect that their forward ends are connected by links 91 (Figs. 1 and 5)' to the two 9 shifter 89and 90, the arrangement being such that when either actuating lever 28 or 28 is rocked, the corresponding bevel gear 86 or 87 is moved into engagement with the bevel gear The gear 87 is utilized for the carriage return and the gear 86 for moving the carriage for indenting or tabulating purposes. When the gear 87 is shifted by the actuating lever 28 into engagement with the gear 85 in order .to return the carriage, itis held in driving engagement with gear 85 until the carriage is given its full return movement. This is accomplished in this instance by providing on the end ofthe sleeve forming a part of gear 87 a disk 92. (Fig. 5) having its periphery beveled in opposite directions and engaged by a so-called spring joint 93 which by engaging one beveled side or the other of disk 92 holds the gear 87 in either engaged or-disengaged position. The gear 87 is automatically disensponds to the so-cal'ledtypewriter front rod endwise movement on the main frame.

of ordinary typewriters, this rod carrying an adjustable stop 97 which can be positioned by the usual means wherever desired and is adapted to be engaged by a shoulder 98 (Figs. 2 and 4) carried by the carriage frame. The rod 71, unlike the corresponding rod in the usual typewriter construction, is capable of a slight endwise movement, being normally.

held in one extreme position by a spring 99 (Figs. 1 and 5) engaging the head 95. When the shoulder 98 of the carriage frame engages the adjustable stop 97, the rod 71 is shifted endwise (against spring 99) sufficiently to rock lever 94 far enough to cause the disk 92 to pass the spring point, in which event the gear 86 is disengaged from the gear 85 and is held in disengaged position.

The gear 86 used for tabulating or indenting purposes is held in engagement with gear 85 until automatically released by the following means: The rear end of the actuating lever 28 which, as before explained, shifts the gear 86 into engagement witlrgear 85, is provided with an upstanding rod 100 (Figs. 2 and 5) connected to a: pin 101 (Fig. 5) of the tabulating frame 102 which is adapted to rock back and forth on .the main frame 10 of the machine, but unlike the tabulating frame of ordinary typewriters, is capable of sli lglht e function of the rod 100 connected to pin 101 of the tabulating frame is to swing it inwardly and when this occurs the frame is held in its inward position by reason of the fact that a pin 103' (Figs; 2 and 5) carried by the tabulating frame is by'uthe inward movement carried slightly above a locking plate 104, and when the pin passes above the locking plate the tabulating frame is moved slightly in endwise direction by a spring 105 (Fig. 5) surrounding one of the'pivots for the frame. This carries. the pin over the locking plate which is therefore held in its inwardly swun position (to which it was moved by rod 100 until the tabulating movement is completed, and when this occurs, the tabulating frame is moved back against the pressure of spring 105 by the engagement of a shoulder 106 with an adjustable stop such as indicated at '107 carried by the tabulating frame (Figs. 2 and 5)). The slight blow imparted to the adjusta le stop by the shoulder of the carriage frame moves the tabulating frame (against and that it will be held in engagement therewith so as to move the carriage to give the right indentation or tabulation, the amount of which will depend upon the adjustment given to stop 107, the carriage thus being shifted by, the motor after which the driving engagement is broken by the automatic disengagement of gear 86 from gear 85.

Likewise it will be seen that either a. perforation of the record sheetor the depression of a shift-key causes gear 87 to be shifted into engagement with gear 85 so as to cause the carriage to be returned by the motor, gear 87 being held in engagement with gear 85 untilthe carriage is returned to a point'determined by the position of the adjustable stop of the front rod 71 of themain frame which then causes the disengagement of gear 8? from gear 85.

It is to be understood that normally gear 85 is disengaged from both gears 86 and 87 and it is only when the tabulating\or returnmovements are being imparted to the carriage frame that either of these, gears 86 or 87 is in driving engagement with gear 85.-

,The fact that gear 85 is normally free of the driving gears 86 and 87 makes it possible for the step-by-step carriage spacing to be accomplished by the power ofthe motor which is applied, as heretofore explained, by therock shaft 55 and pawl 76 which engages the ratchet wheel 76. Each time the pawl engages the ratchet wheel and moves it forward one step, the nut 74 as a whole is ro-. tated through one step suflicient to space the carriage frame. During this movement of the nut, the gears 75, 78, shaft 80, gears 83 and shaft 84 with its gear 85 turn idly.

Inasmuch as the rock shaft 55 is rocked by one of the arms supporting the actuator 53 and by the arm 69 actuated by the eccentric on the main motor driven shaft 56, it is obvious that the pawl 7 6 is given one forward stroke during each revolution of' shaft 56, this stroke occurring immediately after the type bar has been swung to printing position and during the return or upward stroke of thev impressions are made with respect to the rotation of the motor driven shaft 56 except for the spacing between words which is taken care of by a third special actuating lever here designated 28 which is similar in its mountmay be caused to occur only after each printing operation and for each wordspa'cing, a control mechanism for the pawl 76 is em ploye'd, and in carrying out this part of my invention I utilize the so-called universal bar 'commonlyemployed on typewriters, but with new functions to be performed by it. This universal bar includes the arc-shaped piece 109, this member, as customary, lying in a slot on the rear of the slotted segment 20 in position to be engaged and moved rearwardly by each type bar 18 as it is swung upwardly to printing position. From this piece extend rearwardly arms 110 (Fig. 3) which are connected to the upstanding arms 111 of a lever 112 (Figs. 1, 3 and 4) pivotally supported on the rear part of frame 82, a spring 113 (F ig.-3) being attached to the lever to hold these parts in their forwardmost positions with the arc-shaped member 109 in the slot on the rear side of the slotted segment 20. The arrangement is such that on each actuation of any type bar this universal bar is moved rearwardly as in ordinary well known typewriters.

One of the arms 110 is, in this instance, provided with a laterally extending stud 114 (Fig. 6) which normally lies over a lug 115 on pawl 7 6 the lug being shown in Figs. 3, 6 and 7. As long as the universal bar is in its forward or normal position, the stud overlies the lug on the pawl and holds the pawl rides beneath the stud.

out of engagement with the ratchet wheel 76 for a sutficient part of the stroke of the pawl to prevent it turning the ratchet wheel, and, therefore, regardless of the number of oscillations which this pawl may have by the rocking of shaft 55 the ratchet wheel is not actuated but when the universal bar moves rearwardly as by .the actuation of a type bar the stud rides past the lug 115 on the pawl and this allows the pawl to move upwardly into engagement with the ratchet wheel so that the pawl will on its next rearward stroke turn the ratchet wheel one step. 'Asthe universal bar moves back or forwardly toward the front of the machine to its normal position, the stud passes under the lug 115 .to ;a..-- position forwardlyof it, but on thereturn of the pawl the lug, by reason of'thefabt that it has an inclined top surface, again For the word spacing, i.--e.-,"t(i pace, the carriagethe usual distance after each word is completed, the special'actuating lever 28 is utilized, which lever is arranged directly beneath a downward and forward extension 116 of lever 112 (Figs. 1 and 3), this actuating lever being adapted to be shifted by the actuator 53 as before through the selection by the perforated record sheet or by the manual depression of a special shift-key or bar as-may be found desirable, the key, if the same is utilized being on a key lever such as those previously described and designated 11 and serving to move this special actuating lever 28 forwardly so that its front end may be shifted downwardly by the actuator in precisely the same manner as previously described for the other actuating levers. As the rear end of this actuating lever. 28 is elevated it engages the extension 116 of lever 112 and shifts the universal bar so as to release the lug 115 of pawl 7 6* from the stud 5 114 in precisely the same way as the lug is released from the stud by the action of the different type'bars.

For elevating the platen so that the upper case letters of the type bars will be effective for printing, the shifting mechanism ordinarily employed in typewriters may be utilized except that a fourth special actuating lever similar to those already described will be suitably connected'to the lift frame of the typewriter, this lever being shifted by the actuator 53 in the manner previously described and being controlled either through the record sheet or by the usual shift-key which will bring this special actuating lever into the path of movement of the actuator 53. It is not deemed necessary, however, to illustrate this special actuating lever as its operation will be understood by one skilled in the art.

The operation is as follows: The perforated record sheet which as already stated is generally endless, is slippedover the sprockets 47 and shield 43 by inserting the sheet over these parts through the slot or opening 46 in one of the sides'of the frame. motor can then be started by closing a conveniently located switch, or the motor may The previously have been in operation and may 7 be caused to operate the machine by throwing in a suitable clutch. The motor 'now driving shaft 56 swings the motor drivenactua'tor- 53 up and down and swings the oscillating members 45 and 50 back and forth,

these'last twomentioned members swinging in unison, the forward motion being slightly in advance of the downward stroke of H the actuator 53. Simultaneously with the forward stroke of the'oscillating members.

45 and 50 the pawl 49, by its engagement with the ratchet 48, causes the sprockets and,

therefore, the record sheet to be moved forwardly one step. The unperforate'd portion of the record sheet holds the, pins 37 at the rear endsof the actuating IeversZS out of end 'of the corresponding actuating lever to be elevated in front of .the forward oscillatthe path of movement of the rear oscillating member 45, but when a perforation comes beneath one of these pins the latter drops downwardly in front of the oscillating member, causing the actuating lever which carly, it being understood that during this automatic operation the key levers 11 are'not moved since they have no mechanical connection with the actuating levers.

As each type bar swings to printing position the pawl 76 is permitted to engage the ratchet 76 and as the actuator swings upwardly the pawl moves rearwardly turning the nut 74 one step so as to positively space the carriage one step and thereby position the platen for thenext letter, it being understood that the pawl 76 is prevented from shifting the ratchet and spacing the carriage except after a printing impression is made and except for the word spacing, the pawl in the latter case being released by the movement of the special actuating lever 28 which brings about the release of the pawl 76 the same as is done by a type bar. Thus the spacing both for the letters and for the words is done positively through the pawl and ratchet mechanism causing the carriage frame and carriage to be moved laterally step by step. v i

If at any time it is desired to insert matter not covered by the record sheet such as the name, address, salutation, and the like, or a paragraph or more in the body of the matter eing written, the operator disengages the pawl 49 so as toprevent the feed of the rec- 0rd sheet. The matter thus referred to is inserted by the manual operation of the key levers, but as explained in the course of the.

detailed description, the depression of the key levers does not directly cause the type bars to" be swung toprinting position but on the other hand they are actuated as before by the motor driven actuator 53, the manual depression of any particular key lever simply permitting the spring pin at the forward ing bar 50 whereupon the actuating lever is moved forwardly into the path of the actuator 53. That is to say, when the key is de pressed, the forward motor actuated oscillating member 50 is rendered effective to shlft the actuating lever 28 corresponding to .that key. into the path ,of, the actuator 53 whereupon the actuating'lever is rocked and the corresponding type bar is swun to printing position without an further ownward movement on the part 0 the key or key lever since, as pointed out above, the latter has no mechanical connection with the type bar or with the actuating lever associated therewith.

It will be seen, therefore, that I have provided what may be truly stated to be an automatic typewriter as distinguished from the application of an automatic operating mechanism to a typewriter. Heretofore these have been marketed in the form of two units, one the typewriter and the other the positively moving the carriage through the medium of the pawl 7 6* in the same manner as when the selection occurs through the per forated record sheet, the operator depressing the spacing key or bar to bring about the word spacing, this causing the special actuating lever 28 to be operated by the actuator.

As explained above, the carriage is moved positively for letter and word spacing by the motor actuated pawl which gives the nut 74,

and therefore the carriage frame and earriage, a step-by-step movement. Additionally, as explained above, the indenting or tabulating and return movements are im- I parted to the carriage frame and carriage, the nut 74 then beingrotated continuously ("as distinguishing from the step-by-step movement imparted b the pawl) through the motor driven sha s and gears, the engagement vof the proper gear 86 or 87 with the gear being caused by the motor driven actuator '53 and controlled either by the perforated record. sheet or by the manual depression' of theproper key, and the gears bemg disengaged automatically when the carriage reaches the proper position predetermined in each instance by the position of an adjustable stop. i

As stated above, the pawl 7 6 is normally held out of engagement with the ratchet wheel for a sufficient part of the stroke of the pawl to prevent it turning the ratchet wheel 76, but the lug 115 rides past the stud 114 when the pawl is near the end of its rear ward stroke, Figs. 3 and 7 showing the pawl at the end of-its rearward stroke.

Though the pawl is for the major portion of the time out of en agement with the 'ratchet wheel 76, it may e desirable to profering with the return movement of the carriage, as might be the case if the pawl should be at the rear part of its stroke and therefore in substantially the position shown in Figs. 3 and'7 during any part of the return movement of the carriage. This can be taken care of in numerous ways, as, for example, by providing means for holding the pawl out of engagement with the ratchet wheel while the carriage return is taking place. i

In the drawings I have shown one way of accomplishing this through the medium of a finger 117 which is supported in the plane of the pawl and is adapted to be swung downward so as to hold the pawl 76 out of engagement with the ratchet wheel throughout the rearward stroke of the pawl, this finger being actuated, in this instance, by the rocking oflever' 94. To accomplish this, the finger 117 is mounted on a small rock shaft 118 supported in bearings on the rear side of the frame, in this instance slightly to the rear of shaft '80, and this rock shaft is adapted to be turned through the medium of gears or gear segments 119 (or equivalent means) by a second small rock shaft 120 supported in bearings on the side of the machine adjacent the lever 94, it being recalled that this lever 94 is rocked when gear 87 is moved into engagement with gear 85 for the carriage return. Suitable provision .is made for causing this shaft 120 to be rocked by the movement of lever 94 and this is done, in this instance, throughthe medium of a small lever arm 121 fixed to rock shaft 120, this-lever extending down alongside lever 94 adjacent its plane of movement and having a pin and slot connection with the lever 94. The arrangement is such that as the upper part of lever 94 is moved outwardly when gear 87 is moved into engagement with gear 85, rock shaft 120 is turned by the action of lever arm 121 and this turns rock shaft 118 so as to swing the end of finger 117 down to a position such that it will keep the pawl 76? depressed and prevent it from rising into engagement with the teeth (if the ratchet wheel 7 6, the finger having its end normally above and clear of the pawl; v

on the completion of the return movement of the carriage the lever 94 is rocked in the reverse direction so as to disengage gear 87 from gear 85, as previously explained, and

" this elevates the finger 117.

'-The same results can beaccomplished in other ways, as by providing in one of the shafts, such as the shaft 80 or shaft 84, afriction clutch or equivalent means for allowing the parts to slip relatively if the pawl 76 should move into engagement with. the ratchet wheel 76 during the return movement I of the carriage. In Fig. 8 I have shown conventionally a friction clutch composed of two frictionally engaged parts 122 and 128, this g friction clutch being arranged in shaft 80.

- type bars,

With a friction clutch such as herein illustrated, there is normally no slippage, but ifl the with the backward rotation of the ratchet wheel 76 while the carriage is being returned,

ping of the clutch and as soon as the pawl moves out of engagement with .the ratchet wheel the return movement of the carriage is completed, the clutch then driving the parts without slippage. The frictional engagement between the parts 122 and 123 of the clutch may be adjusted by adjusting a cap 123 which, as shown, is screwed onto'the part 123.

The carriage can be moved by hand in either direction, if desired, when the pawl 76 is disengaged from the ratchet 76, and. to permit this to be done quietly it is ogl necessary to depress a-small lever shown in Fig. 1, is supported adjacent the ratchet wheel 76, this lever which is spring 124 wear??? pawl 76 should temporarily interfere ,1

pressed holding in position a small detent v direction. The release of thede'tent is not essential to movement of the carriage by hand, as explained above, but by releasing the detent it can be moved somewhat easier and more quietly.

Though the release of the detent is not necessary for the carriage return, the return can be accomplished somewhat more quietly if the detent is released, and, if desired, means may be provided for automatically releasing the detent during the carriage return. This can be accomplished in different ways, and inthis instance by a finger 126 mounted on rock shaft 118 and so arranged that when the rock shaft is rocked so as' to swing finger 117 inwardly to keep the pawl 7 6 disengaged from the ratchet wheel 7 6, finger 126 will at om theratchet wheel It i the same time engage and depress the end of p v the detent lever 124. Of course, on the completion of the return movement finger 126 will move out of engagement with the detent lever at the sametime that finger 117 moves backor away from the path of movement of pawl 76*.

It will be understood from what has pre ceded that by positively moving the carriage I mean a power operated movement in the same sense that the type bars are positively moved or power operated when moved to printing'position, the power for performing all these operations on the carriage and as well as for moving the record sheet, being preferably derived from asinle electric motor as herein described.

While I have shown one construction 0 w the return movement 1s checked by the shpmachine may be modified in many of its de tails and I, therefore, do not desire to be confined to the particular construction shown and described as "the principle of the invention may be carried out in other ways, and I aim in my claims to cover all modifications which do not involve a departure from the spirit and scope of my invention as set forth in the appended claims. 1

Having thus described my invention, what I claim is: V

1. In an automatic typewriter having a keyboardflsype bars, a transversely movable carriage, and provisionvfor receiving a perforated record sheet, automatic means controlled either through the record sheet or the manual depression of the keys for causing the actuation of the type bars,'an d automatic means similarly controlled for positively moving the carriage and including a device operatively connected to the carriage and operable by power in either direction.

2. In an automatic typewriter having a keyboard, type bars, a transversely movable carriage, and provision for receiving a perforated record sheet, automatic means con trolled either through the record sheet or the manual depression of the keys for causing the actuation of the type bars, and automatic means controlled either through the record sheet or manually for positively moving the carriage in either direction and comprising a reversible power operated member connected with the carriage.

3. In an automatic typewriter having a keyboard, type bars, a transversely movable carriage, and provision for receiv1ng a perforated record sheet, means for positlvely moving the carriage in either direction including a device connected with the carriage and power operated in either direction, and

- means whereby the carriage moving means is controlled either manually or through the perforated record sheet. p

4:. In an automatic typewriter having a keyboard, type bars, a transversely movable carriage, and provision for receiving a perforated record sheet, means for positively moving the carriage in either direction 1ncluding a reversible power operated device connected with the carriage, and means whereby said device is controlled either. man ually or through the perforated record sheet so as to give the carriage step-by-ste'pmovements in letter and wordspacing or -rela'-' tively long movements for tabulating purposes and for the carriage return.

5. In an automatic typewriterhaving a keyboard, type bars, a transversely-movable carriage, and provision for receiving a perfo rated record sheet, means for positively mov-- ing the carriage, including a continuously moving carriage'moving member anda part power operated means for moving the 'carriage for letter and word spacing purposes, additional power operated means for moving the carriage for tabulatin purposes and for the carriage return, a mem' er connected with the carriage and adapted to be actuated by either of said means, and means whereby either of said power operated means is rendered effective either manually or through the perforations of the record sheet.

7 In an automatic typewriter having a keyboard, type bars, a transversely movable carriage, and provision for receivlng a perforated record sheet, a power operated memher for shifting the type bars and a power operated member for moving the carriage in either direction, and means whereby elther power operated member is rendered effective manually or through the record sheet.

8. .In an automatic typewriter having a keyboard, type bars, a transversely movable carriage, and provision for receiving aperforated record sheet, a power operated type bar shifting member and a power operated carriage moving member both constantly moving in synchronous relation, and means whereby either of said power operated means is rendered effective through manual control or through the control of the record sheet.

9. In an automatic typewriter having a keyboard, type bars, and a transversely movable carriage frame, means for posltlvely moving the carriage frame comprising a screw and a nut one held' against lateral movement and the other carried by the carriage frame, and power operated means for shifting one of said parts in either direction.

10. In an-automatic typewriter having a keyboard, type bars, a transversely movable carriage frame, means for moving the carriage frame comprisinga screw carried by the carriage frame, a nut engaging said screw, and power means adapted to be connected to said nut-to turn the same in either direcof engaging threadedmember's one carried by the carriage frame, and power means controlled either manually or through the recs ord sheet for causing the other threaded member to be turned to move the carriage in either direction.

12. In an automatic typewriter'having a keyboard, type bars, a transversely movable carriage frame, and provision for receiving a perforated record sheet, means for positively moving the carriage comprising two the carriage frame, a nut engaging said screw,

power operated means for turning the nuttrolled either manually or by the record sheet for causing either of said power operated means to function.

14. 'In an automatic typewriter having a keyboard, type bars, a transversely movable carriage, and provision for receiving a perforated record sheet, means for positively moving the carriage so as to space the carriage after each printing operation, said means including a pawl and ratchet, one part operatively connected to the carriage and power means connected to the other part and serving to give it a constant motion, and means whereby the power actuated carriage moving means may be controlled either manually or through the perforated record sheet.

15. In an automatic typewriter having a keyboard, type bars, a transversely movable carriage, and provision for receiving a perforated record sheet, means for positively moving the carriage after each printing operation, said means including a pawl and a ratchet wheel adapted to be engaged by the pawl and to be given a step-by-step movement thereby, means by which said step-bystep movement is transmitted to the carriage, power operated means for giving said pawl a constant back and forward motion, and means controlled either through the record sheet or by the manual depression of the keys for causing the power actuation of the ratchet wheel by the pawl.

16. In an automatic typewriter having a keyboard, type bars, a transversely movable carriage, and provision for receiving a perforated record sheet, automatic means controlled either through the record sheet or by the manual depression of the keys for causthe actuation of the type bars, a universal bar adapted to be shifted by the type bars,

and means controlled by the movement of the universal bar for causing a positive movement of the carriage after each printing impression.

17. In an automatic typewriter having a keyboard, type bars, a transversely movable carriage, and provision for receiving a perforated record sheet, means for positively moving the carriage, means controlled either through the record sheet or by the manual depression of the keys for causing the actuation of the type bars, a universal bar adapted to be shifted by the type bars, and means actuated by the movement of the universal bar for causing the actuation of the carriage moving means so as to space the carriage after each printing impression. 1 p

18. In an automatic typewriter having a keyboard, type bars, a transversely movable carriage, and provision for receiving a perforated record sheet, means for moving the carriage for letter and word spacing purposes comprising a constantly moving power operated pawl, a ratchet wheel adapted to be actuated thereby, and a movement transmitting connection between the ratchet wheel and the carriage, a universal bar'adapted to be actuated by the type bars, and means whereby the actuation of the ratchet wheel by the pawl is controlled by the movement of the universal bar.

In testimony whereof, I hereunto aflix my signature.

KELLEY D. EVANS. 

